[gradsusr] speed/performance: GRADS scripting language vs GERL

[Arlindo da Silva]

On Thu, Jan 6, 2011 at 5:01 PM, pr <romero619 at hotmail.com> wrote:

> I have a new grads application where speed is the highest priority.
>
> My grads script is fairly long & complicated, and runs through a multi-plot
> loop.
>
> I find that certain things are rather limited in the grads scripting
> language (ex. running system commands & processing their output), and Im
> forced to do some ugly workarounds.
>
> So I’d like the added power of perl, but Im worried about the effect that
> the added perl overhead will have on overall processing speed.
>
>
>
> Does anyone have any thoughts/opinions on the speed/performance of using
> traditional grads scripts files vs. using the perl interface?
>
>
>

Think it will depend very much on the nature of your script, and how often
you interact with the grads subsystem (say, 'q dims', sublin/subwrd, etc.)
I'd suspect that for pure scripts that do not interact with the grads
subsystem perl would be a bit faster. Now, there is some overhead of the
perl interface interacting with the grads subsystem, more so than with a gs
script. In all of my applications this overhead is negligible compared to
the time spent with I/O, analysis and plotting. It is hard to say in
general, you will need to profile your script.

    Arlindo.

> Thanks,
>
> P.Romero
>
>
>
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-- 
Arlindo da Silva
dasilva at alum.mit.edu
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